Tektronix PHASER 840 Service Manual page 199

19: Yellow Solid Fill. This prints shows
uniformity of fill.
Look for: Even, uniform fills throughout
the print. There should be no wrinkling or
deformity of the paper throughout the
print.
Causes: Weak jets or uneven drum
heating may cause uneven fills.
To solve wrinkling, try different print
media. Replace the drum maintenance
tray to correct streaking.
Check the drum-temperature sensor for
debris build-up on the sensor. Or the
sensor is in improper contact with the
drum. Refer to the test print Reverse
Text.
The transfix pressure may be incorrect.
Perform the transfix spring adjustment
described in "Transfix roller pressure
spring adjustment" on page 110. As a last
resort, replace the drum/transfix
assembly.
20: OHP Color Bands. This print
consists of sequential bands of primary
and secondary colors followed by a blue
tint. This print is used for manufacturing
and engineering evaluation of printhead
performance.
0388-37
188 Phaser 840 and 850 Color Printers